Quincy Bridge Company ended in 1866.
Quincy Railroad Bridge Company ended in 1903.
Quincy Bridge Company was created in 1866.
Quincy Memorial Bridge was created in 1928.
Keithsburg Bridge Company ended in 1901.
Sibley Bridge Company ended in 1900.
Railroad Bridge Company ended in 1866.
Michigan Central Bridge Company ended in 1898.
Detroit River Bridge Company ended in 1905.
Pee Dee Bridge Company ended in 1915.
Mercer County Bridge Company ended in 1885.
St. Louis Merchants Bridge Company ended in 1920.
Hudson River Bridge Company at Albany ended in 1976.